The G0 experiment: Apparatus for parity-violating electron scattering measurements at forward and backward angles

In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part-per-million in the scattering of...

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Published in:	Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 646; no. 1; pp. 59 - 86
Main Authors:	Androić, D., Armstrong, D.S., Arvieux, J., Asaturyan, R., Averett, T.D., Bailey, S.L., Batigne, G., Beck, D.H., Beise, E.J., Benesch, J., Benmokhtar, F., Bimbot, L., Birchall, J., Biselli, A., Bosted, P., Brindza, P., Carlini, R.D., Carr, R., Chant, N., Coppens, A., Covrig, S.D., Cowley, A., Dale, D., Davis, C.A., Ellis, C., Falk, W.R., Finn, J.M., Forest, T., Franklin, G., Frascaria, R., Furget, C., Gaskell, D., Gericke, M.T.W., Grames, J., Guillard, G., Guillon, B., Guler, H., Gustafsson, K., Hannelius, L., Hansknecht, J., Hasty, R.D., Hawthorne Allen, A.M., Horn, T., Ito, T.M., Johnston, K., Jones, M., Kazimi, R., King, P.M., Kolarkar, A., Kox, S., Kuhn, J., Lenoble, J., Liatard, E., Liu, J., Lung, A., MacLachlan, G.A., Mammei, J., Martin, J.W., Mack, D.J., McKee, D.W., McKeown, R.D., Merchez, F., Mihovilovic, M., Mkrtchyan, H., Moffit, B., Morlet, M., Muether, M., Nakahara, K., Neveling, R., Ong, S., Page, S.A., Papavassiliou, V., Pate, S.F., Phillips, S.K., Pillot, P., Pitt, M.L., Poelker, M., Porcelli, T.A., Quéméner, G., Quinn, B.P., Ramsay, W.D., Real, J.-S., Roche, J., Roos, P., Rutledge, G.A., Secrest, J., Smith, G.R., Spayde, D.T., Stepanyan, S., Stutzman, M., Tadevosyan, V., Tieulent, R., van Oers, W.T.H., Voutier, E., Vulcan, W.F., Wells, S.P., Williamson, S.E., Woo, R.J., Wood, S.A., Yun, J.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-08-2011 Elsevier
Subjects:	Accelerators Beams (radiation) Detectors Elastic scattering Electron scattering Electronics Instrumentation and Detectors Liquid hydrogen target Magnetic spectrometer Nuclear Experiment Parity-violation Physics Polarized electron beam Scattering Scintillation Spectrometers Parity-violation Magnetic spectrometer Electron scattering Polarized electron beam Liquid hydrogen target
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Summary:	In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part-per-million in the scattering of a polarized electron beam are determined using a dedicated apparatus. It consists of specialized beam monitoring and control systems, a cryogenic hydrogen (or deuterium) target, and a superconducting, toroidal magnetic spectrometer equipped with plastic scintillation and aerogel Cherenkov detectors, as well as fast readout electronics for the measurement of individual events. The overall design and performance of this experimental system is discussed.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0168-9002 1872-9576
DOI:	10.1016/j.nima.2011.04.031